Abstract
Noteroclada Taylor ex Hook. & Wilson has long been recognized as a unique leafy taxon having affinities to the north temperate, simple thalloid liverwort genus, Pellia Raddi. Although a suite of diagnostic characters clearly separate it from Fossombronia Raddi and other leafy, anacrogynous taxa, considerable confusion regarding its identity exists in historical treatments. There are unresolved questions in regards to the extent and significance of morphological variation within the genus, the number of species that should be recognized, the geographic range that it occupies and its position in liverwort phylogeny. Morphological, experimental and molecular techniques are employed to address these questions. These studies show that there are two forms of perennating tubers, which are geographically partitioned, that plants are always monoicous, that sporophytes are enclosed by a shoot calyptra and Fossombronia-like caulocalyx and that sporeling ontogeny is different from that of Pellia. Molecular analyses show some genetic variation within Noteroclada, but both morphological and molecular data support the recognition of but a single species, N. confluens Taylor ex Hook. & Wilson. It is confirmed that there are no reliable specimens of Noteroclada from Africa, Australasia or the Kerguelen sector and that the genus has two centers of distribution in Latin America, with disjunct populations in the Falkland Islands, South Georgia, Tristan da Cunha and Gough Island. Significant ontogenetic differences between Noteroclada and Pellia support their placement in separate monogeneric families of the Pelliales.
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Claims 10
Claim · model-written summary
Noteroclada has two geographically partitioned forms of perennating tubers.
- Taxon
- NoterocladaNoterocladat0
- Outcome
- two forms of perennating tuberse0
- Value
- two formse0
Verbatim
e0“there are two forms of perennating tubers, which are geographically partitioned”
t0“of Noteroclada (Noterocladaceae”
Claim · model-written summary
Noteroclada plants are always monoicous.
- Taxon
- NoterocladaNoterocladat0
- Outcome
- always monoicouse0
Not reportedDirection
Verbatim
e0“plants are always monoicous”
t0“of Noteroclada (Noterocladaceae”
Claim · model-written summary
Noteroclada sporophytes are enclosed by a shoot calyptra and Fossombronia-like caulocalyx.
- Taxon
- NoterocladaNoterocladat0
- Outcome
- sporophytes are enclosed by a shoot calyptra and Fossombronia-like caulocalyxe0
Verbatim
e0“sporophytes are enclosed by a shoot calyptra and Fossombronia-like caulocalyx”
t0“of Noteroclada (Noterocladaceae”
Claim · model-written summary
Noteroclada sporeling ontogeny differs from Pellia.
- Taxon
- NoterocladaNoterocladat0
- Outcome
- sporeling ontogenye0
- Direction
- differente0
- Comparator
- Pelliae0
Verbatim
e0“sporeling ontogeny is different from that of Pellia”
t0“of Noteroclada (Noterocladaceae”
Claim · model-written summary
Molecular analyses found genetic variation within Noteroclada.
- Taxon
- NoterocladaNoterocladae0
- Outcome
- some genetic variatione0
Verbatim
e0“Molecular analyses show some genetic variation within Noteroclada”
Claim · model-written summary
Morphological and molecular data support one species, N. confluens.
- Taxon
- N. confluens
Noteroclada confluense0 - Outcome
- a single speciese0
- Value
- a single speciese0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“both morphological and molecular data support the recognition of but a single species, N. confluens Taylor ex Hook. & Wilson.”
Claim · model-written summary
No reliable Noteroclada specimens were confirmed from Africa, Australasia or the Kerguelen sector.
- Taxon
- NoterocladaNoterocladae0
- Outcome
- no reliable specimense0
- Setting
- Africa, Australasia or the Kerguelen sectore0
Verbatim
e0“there are no reliable specimens of Noteroclada from Africa, Australasia or the Kerguelen sector”
Claim · model-written summary
Noteroclada has two centers of distribution in Latin America.
- Taxon
- NoterocladaNoterocladat0
- Outcome
- two centers of distributione0
- Value
- two centerse0
- Setting
- Latin Americae0
Verbatim
e0“the genus has two centers of distribution in Latin America”
t0“of Noteroclada (Noterocladaceae”
Claim · model-written summary
Noteroclada has disjunct populations in the Falkland Islands, South Georgia, Tristan da Cunha and Gough Island.
- Taxon
- NoterocladaNoterocladat0
- Outcome
- disjunct populationse0
- Setting
- Falkland Islands, South Georgia, Tristan da Cunha and Gough Islande0
Verbatim
e0“disjunct populations in the Falkland Islands, South Georgia, Tristan da Cunha and Gough Island”
t0“of Noteroclada (Noterocladaceae”
Claim · model-written summary
Ontogenetic differences support placing Noteroclada and Pellia in separate monogeneric families.
- Taxon
- NoterocladaNoterocladae0
- Outcome
- placement in separate monogeneric families of the Pellialese0
- Comparator
- Pelliae0
Verbatim
e0“Significant ontogenetic differences between Noteroclada and Pellia support their placement in separate monogeneric families of the Pelliales.”